Is it normal to feel the port implanted under your skin, from adjustable breast augmentation? Can your body reject the port?

I am 4 days post op and i was adjusting my garment when i felt something poke me! It was my port! I freaked out! Upon further examination I notice that i can feel both ports! When i sit i feel it poke me! There is slight irritation on my skin right above where the port is, not at the incision, just over the skin! I have been on antibiotic, but this is all so creepy to me! What happens if i need to get the port removed before the 3 month grace period? Is it normal to feel the port like this?